Make the Crust

1. Preheat Oven: Preheat your oven to 325°F (165°C). Grease a 9-inch springform pan with butter or non-stick spray.
2. Prepare the Crust: In a medium bowl, combine the graham cracker crumbs, granulated sugar, and melted butter. Mix until well combined and the mixture resembles wet sand.
3. Press the Crust: Press the mixture evenly into the bottom of the prepared springform pan, creating a firm crust. Bake in the preheated oven for about 10 minutes until set. Let it cool completely while you prepare the filling.

Prepare the Cheesecake Filling

1. Beat the Cream Cheese: In a large bowl, beat the softened cream cheese with an electric mixer until smooth and creamy. Scrape down the sides of the bowl as needed.
2. Add Sugar and Vanilla: Add the sugar and vanilla extract, continuing to beat until fully combined.
3. Incorporate the Eggs: Add the eggs one at a time, beating well after each addition.
4. Add Flour and Sour Cream: Mix in the sour cream and flour, and beat until smooth. Stir in the Sorel liqueur and mashed blackberries for a fruity, herbal twist.
5. Pour into Pan: Pour the cheesecake filling into the cooled graham cracker crust, spreading it evenly.

Bake the Cheesecake

1. Bake the Cheesecake: Bake in the preheated oven for 55-60 minutes, or until the center is almost set but slightly jiggly. The edges should be lightly golden.
2. Cool and Chill: Let the cheesecake cool to room temperature, then refrigerate it for at least 4 hours or overnight for the best texture.

Make the Blackberry Sauce

1. Cook the Blackberries: In a small saucepan, combine the fresh blackberries, honey, Sorel liqueur, and lemon juice. Cook over medium heat, stirring occasionally, until the blackberries break down and the sauce thickens, about 5-7 minutes.
2. Strain the Sauce: For a smoother sauce, strain the blackberry mixture through a fine mesh sieve to remove the seeds. Let it cool before drizzling over the cheesecake.

Serve the Cheesecake

1. Top with Sauce: Before serving, drizzle the blackberry sauce over the cheesecake, allowing the vibrant color to contrast beautifully with the creamy filling.
2. Garnish: Garnish with a few fresh blackberries on top for added flair.
3. Slice and Serve: Carefully slice the cheesecake and serve chilled.